Actually power supply repair is rarely - less expensive to replace it with new. A defective power supply is usually thrown away, unless, of course, it is not a quality or expensive. In the latter case it is better to send it to a firm that specializes in the repair of power units and other components. (more…)

The quality of power supply depends not only on power output. Experience shows that if a room is more than one computer and electrical network quality is low (often disappears voltage noise occurs, etc.), systems with powerful power supply systems work much better with low-cost units to be installed in some models of low-class . (more…)

This article will discuss about the alert function of pc power supply. The main voltage power supply, which supply the computer is +12 volts. Power supply for this circuit should provide a large output current, especially in computers with lots of drive bays. 12 V is applied also to the fans, who tend to work all the time. Usually, the fan motor consumes between 100 and 250 mA, but with newer computers, this value is less than 100 mA.

Feature of this transistor compensation voltage (see picture) - used in the feedback field effect transistor VT3, which acts as a dynamic load for the transistor VT2. Because of this factor increases the voltage regulation: when the input voltage from 11 to 19 V output voltage varies within ± 60 mV. Rated output voltage using Zener type D814B is 9 V. (more…)